Muffler



C. D. FULLERH MUFFLER.

APPLICATION FILED SEPT. 30. 1919,

Patented N 0V. 30,

. that they will not burn out.

device.

PATENT OFFICE.

CLARENCE D. FULLER, OF UTICA, NEW YORK,

MUFFLER.

specification of Letters Patent.

Patented Nov. 30, 1920.

Application filed September 30, 1919. Serial No. 327,375.

cation, reference being had therein to the ac- A companying drawings.

rl"his invention has for its object to provide.

an improved muffler, for internal combustion engines, which although mainly of sheet metal sections which may be readily stamped out, is of such construction that thesheet metal baille plates or disks will be so protected from the hot gases of the exhaust The improved muffler also comprises a regulator by means of which the muffler may be properly adjusted for the most efficient operation in connection withany engine to which it is to be applied, all as will hereinafter more fully apear. p In the accompanying drawings Figure 1 is a longitudinal section. of the improved muffler. Fig. 2 is a cross section of the same on line 22,Fig. 1, showingthe regulating Fig. 3 is a section on line 3-3, Fig. 1, and Fig. 4' isa detail view showing the `means for holding the regulator ina position of adjustment.

Referring to the drawings, 12 denotes the flanged inlet head at one end of the-muffler, said head having `an internally screw threaded boss 13 for the rece tion of a nut 14 by which the muffler may he connected with an exhaust pipe. At the opposite end of the muffler is a flanged outlet head 15 having a boss 16 at the outletopening. The body of the muffler, between the end heads 12 and 15, .comprises several cup-shaped sections 17 preferably stamped from sheet steel, each of these sections affording a disk-like baffle plate 1.7EL having several openings 171. These sections 17 are formed Awith shoulders 17c afforded by the reduced parts 1711 fitting or telescoping within the ends'of the adjacent sections and against which shoulders the adjacent section abut. y

Near the inlet head 12 is a' baffle protecting plate 18v having openings 1811, a lateral flange 181 and a peripheral flange 18c betweenfwhich latter and al peripheral flange 12a on the end head 12 is interposed a sheet metal ring 19 which abuts against said flanges 18c and 12a and is entered by a lateral flang 181 on-the plate 18 and a lateral flange 1211on the'head 12.

provided near the. exhaust head 15 with a second baille protecting plate 20 formed like .the protecting plate 18 in that it has openings 201, lateral flanges 201 and a peripheral flange 2Oc between which latter and said exhaust head 15 is interposed a second sheet metal ring 21 which abuts against the flange 2 0c on the plate 2O and also against a peripheral flange 15jL of the exhaust head 15, said ring beingentered by a lateral flange 201 on the plate 2O and a lateral flange 151 on said exhaust head.

The several sections of the mufller are held. together by longitudinal tie rods 22 passing through the several sections thereof and provided at their ends, outside of the end heads, with nuts 23, three ofr these tierods preferably being provided. The end heads 12 and 15 and the protecting plates 18 and20 are preferably of malleable cast iron and the lateral flanges on said heads and plates are preferably slightly tapering so that when the mufiler sections aie drawn together byscrewing up the nuts 23 on the rods 22 the joints between the parts will 'be astight as possible. The openings in the protecting plates 18 and 20 may be out of register with the openings in the baille disks or plates 17, so as to increase the efficiency of the protecting plates, par ticularly the plate 18 against which the hot exhaust gases first come, while the second protecting plate 20 coperates with the first protecting plate in stiffening the muffler and preventing-metallic resonance or tinny sounds such as would occur to a greater degree with a sheet metal muffler without these stiffen'ing and sound-deadeningparts- These protecting plates. also serve as baille plates, as will be understood.

To adapt the same sized muffler for use in connection with differentsized engines a regulator is desirably provided. This regulator preferably consists of a rotatably ,mounted plate or disk 24 which may be pivotally =.mounted on the plate 20 and which has parts or arms 24;a by which the openings 2Oa insaid plate may be closed more or less by turning saidplate or disk 24 slightly in ico when necessary. The nut QG on the pivot 25 may be screwed up tight enough to retain the regulator inany position to which it may be adjusted, but it is preferred to provide the handle 2st, which is somewhatelastic, with a down-turned lng or projection 2l" adapted to engage any one of a series of notches 20d in the peripheral flange Q0 of a protecting plate Qt). and thus positively retain the regulator in place.

Most ofthe baille plates 17a will preferably be-provided with several openings 1T" say about one'or one and a quarter inches in diameter for a muiller say about six'and a halfl inches in diameter, while one of these baille plates may have a single large opening il@ which will serve to vary the patlrof the current of gases passing through the mniller.

`From the foregoing it will be understood that the invention provides an eiiicient niniller of inexpensive cons truction which will last indefiniteljY and which may be adjusted or regulated as may be desired. The

invention is. however, not tobe understood as being limited to the details herein shown and described, as these may be varied widely, within the province of mechanical skill, without departing from the essence of the invention as defined in the claims hereunto appended. A

Having thus described my invention I claim and desire to secure by Letters Patentzl. muffler comprising a series of sheetmetal baille plate sections fitting together and having openings, end heads of cast metal and a cast metal protecting plate interposed between the inlet end head and the sheet metal baille plate sections, combined with tie rods passing through these parts and by which the muiller sections are held together.

2. muffler comprising a series ofsheetnictal baille plate sections fitting together and having openings. end heads of cast metal. a cast metal protecting plate interposed between the inlet end head and the sheet metal baille plate sections, and a second protecting plate near the exhaust head, combined with tie rods passing through these parts and by which the muffler sections are held together. i

t muiller comprising a series of sheetmetal baille plate sections 4each having a reduced part to enter an adjoining section and a peripheral shoulder against which an adjoining section abuts, said baille plate sections having openings,` cast metal end heads having peripheral and lateral flanges, cast metal protecting plates near each end of the muiller, said plates having openings and peripheral and lateral flanges, and sheet metal rings between said end heads and said protecting plates, combined with tie rods passing through these parts and by which the mniller sections are held together.

A mufller comprising a series of sheetmetal baille plate sections each having a reduced part to enter an adjoining section and a peripheral shoulder against which an adjoining section abuts, several of said baille plate sections having relatively small openings and one of said sections having a single large opening, cast metal end .heads having peripheral and lateral flanges, cast metal protecting plates near each end of" the muillersaid plates having openings and periphe 'al and lateral flanges, and sheet metal rings between said end heads and said protecting plates, combined with tie rods passing through these parts and by which the muffler sections are held together.

A muiller comprising cast metal end heads having peripheral and late al flanges, cast metal protecting plates also having peripheral and lateral flanges, sheet metal battle plates between said cast metal protecting plates, said sheet metal baille plates telescoping. together, and sheet metal rings fitted between the peripheral flanges of said heads and the peripheral flanges of said cast metal protect-ing plates, combined with tie rods for holding the muiller sections to- A gethe r.

`the casing of the inuillcr, said handle part having a lug or projection, and a notched part to be engaged by said lug.

In testimony whereof ailix my signature.

CLARENCE D. FULLER. 

